using netDxf.Blocks;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;

namespace MetroGauges.Controls.BlockShaps
{
    /// <summary>
    /// 操作方法
    /// </summary>
    public enum OprType
    {
        DrawDxfBlocks,
        ExportSourceBlock,//通过源bock插入
        CopyBlock,
        MoveBlock,
        MoveByX,
        MoveByY,
        ScaleBlock

    }
    public class BlockOpr
    {
        public double ScaleRale { get; set; }
        public netDxf.DxfDocument dxf { get; set; }
        public BlockData BlockData { get; set; }
        public netDxf.Tables.Layer layer { get; set; }

        public System.Windows.Point currentPoint { get; set; }
        public System.Windows.Point dragPoint { get; set; }

        public double rate { get; set; }

        private BaseShap GetBaseShap(FrameworkElement shapeitem)
        {
            BaseShap baseShap = null;
            if (shapeitem is Line) //线段
            {
                baseShap = new BlockLine(shapeitem) { m_ScaleRale = this.ScaleRale };
            }
            else if (shapeitem is Polyline) //多义线
            {
                baseShap = new BlockPolyline(shapeitem) { m_ScaleRale = this.ScaleRale };
            }
            else if (shapeitem is Path) // 
            {
                Path path = shapeitem as Path;
                if (path.Data is EllipseGeometry) //圆
                {
                    baseShap = new BlockEllipse(shapeitem) { m_ScaleRale = this.ScaleRale };
                }
                else if (path.Data is PathGeometry) //圆弧
                {
                    baseShap = new BlockArc(shapeitem) { m_ScaleRale = this.ScaleRale };
                }
            }
            else if (shapeitem is TextBlock)
            {
                baseShap = new BlockText(shapeitem) { m_ScaleRale = this.ScaleRale };
            }
            else if (shapeitem is Rectangle)
            {
                baseShap = new BlockRectangle(shapeitem) { m_ScaleRale = this.ScaleRale };
            }

            return baseShap;
        }
        /// <summary>
        /// 执行方法
        /// </summary>
        /// <param name="block"></param>
        /// <param name="oprType"></param>
        public void ExctecOpr(List<FrameworkElement> block, OprType oprType)
        {
            if (oprType == OprType.ExportSourceBlock)
            {
                ExportBlock();
                return;
            }

            foreach (var shapeitem in block)
            {
                BaseShap baseShap = GetBaseShap(shapeitem);
                switch (oprType)
                {
                    case OprType.CopyBlock:
                        baseShap.CopyBlock();
                        break;
                    case OprType.DrawDxfBlocks: //拆分导出
                        baseShap.DrawDxfBlocks(this.dxf, this.layer);
                        break;
                    case OprType.MoveBlock:
                        baseShap.MoveBlock(this.currentPoint, this.dragPoint);
                        break;
                    case OprType.MoveByX:
                        baseShap.MoveByX(this.currentPoint.X);
                        break;
                    case OprType.MoveByY:
                        baseShap.MoveByY(this.currentPoint.Y);
                        break;
                    case OprType.ScaleBlock:
                        baseShap.ScaleBlock(this.rate);
                        break;

                }

            }
        }

       

        /// <summary>
        /// 插入块
        /// </summary>
        private void ExportBlock()
        {
            if (this.BlockData != null)
            {


                netDxf.DxfDocument dxf2 = netDxf.DxfDocument.Load(this.BlockData.FilePath);
                double moveX = 0, moveY = 0;

                string blockName = BlockData.BlockName.Split('_')[0];
                Block block = dxf2.Blocks[blockName];


                Block forBlock = BlockData.SourceBlock;
                if (BlockData.IsDirection)
                {
                    block = BlockData.ReverseBlock;
                    forBlock = BlockData.ReverseBlock;
                }
                

                //通过两个点计算块的偏移量
                foreach (netDxf.Entities.EntityObject item in forBlock.Entities)
                {
                    if (item.Type.ToString() == "Line")
                    {
                        Line line = item.DataContext as Line; //最终块图的某个点


                        netDxf.Entities.Line dataLine = item as netDxf.Entities.Line; //对应原始块的某个点
                        if (BlockData.IsDirection)
                        {
                            moveX = -line.X1 * ScaleRale - dataLine.StartPoint.X;
                        }
                        else
                        {
                            moveX = line.X1 * ScaleRale - dataLine.StartPoint.X;
                        }
                        
                        moveY = line.Y1 * ScaleRale + dataLine.StartPoint.Y;

                        break;
                    }
                }


                netDxf.Entities.Insert insert = new netDxf.Entities.Insert(block, new netDxf.Vector3(moveX, -moveY, 0));
                //netDxf.Entities.Insert insert2 = new netDxf.Entities.Insert(block, new netDxf.Vector3(0, 0, 0));
                insert.Layer = new netDxf.Tables.Layer("block");
                insert.Layer.Color.Index = 1;
                dxf.AddEntity(insert);
                
            }
        }

        /// <summary>
        /// 获取块的所有坐标点
        /// </summary>
        /// <param name="block"></param>
        /// <returns></returns>
        public List<Point> GetBlockPoints(List<FrameworkElement> block,out Point minPont,out Point centerPoint)
        {
            List<Point> points = new List<Point>();
            minPont = new Point() { X= double.MaxValue, Y=double.MinValue };
            centerPoint = new Point() { X=double.MaxValue, Y= double.MaxValue };

            foreach (var shapeitem in block)
            {
                BaseShap baseShap = GetBaseShap(shapeitem);
                baseShap.m_ScaleRale = this.ScaleRale;
                List<Point> ps = baseShap.GetPoints(); //获取图形外围框左下角坐标
               
                foreach (var item in ps)
                {
                    if (item.X < minPont.X)
                    {
                        minPont.X = item.X;
                    }
                    if (item.Y > minPont.Y)
                    {
                        minPont.Y = item.Y;
                    }
                }
                points.AddRange(ps);
            }

          
            return points;
        }


    }
}